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Preparation method of scratch and yellowing resistant polyurethane woodenware glossy white finish paint

A technology of anti-yellowing and polyurethane, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of substrates covering yellowing, brittleness, and yellowing of coating films, so as to facilitate solvent release and increase flexibility resistance, anti-sedimentation effect

Active Publication Date: 2014-07-23
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the white topcoat used in home decoration cannot be masked by the substrate to hide its yellowing
At this time, if the resin is improperly selected in the formula of the main agent component, it is very easy to cause the coating film after construction to turn yellow quickly in a short time, especially in the northern part of the coating film, it is easy to be brittle at low temperature, so brittle cracking and yellowing Change is the most important quality problem of PU bright white topcoat in the home improvement market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the formula weight ratio, add 5.5 parts of mixed solvent into the dispersion tank, add 20 parts of alkyd resin with 60% solid content, stir and dissolve evenly, then add 25 parts of titanium dioxide, 1.5 parts of dispersant, and disperse at high speed for 30-40 minutes. Grind to a fineness of ≤10μ with a sand mill, then filter, pack and seal for later use.

[0026] Add 20 parts of 60% solid alkyd resin, 15 parts of 70% solid hydroxyl acrylic resin, 6 parts of 60% solid aldehyde and ketone resin, and 6 parts of mixed solvent into the paint bucket and stir to dissolve evenly. Add the above ground titanium white slurry, add 0.2 parts of titanate modified silicone leveling agent, 0.1 part of silicone modified acrylic leveling agent, 0.2 parts of antioxidant, modified silicone defoamer at low speed 0.2 parts and 0.3 parts of fumed silica, stirred and passed the test, filtered and packaged to obtain the anti-scratch two-component polyurethane wood varnish A compo...

Embodiment 2

[0028] Add 40 parts of TDI / TMP adduct, 25 parts of HDI trimer, and 35 parts of mixed solvent into the dispersion tank and stir evenly. After passing the test, filter and pack to prepare the anti-scratch and anti-yellowing polyurethane wood gloss white finish B components.

[0029] Mix the paint according to the ratio of component A: component B = 1:0.5, and add thinner to adjust the viscosity to be brushable.

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Abstract

The invention relates to a preparation method of a scratch and yellowing resistant polyurethane woodenware glossy white finish paint. The finish paint is composed of a resin paint component A and a curing agent component B, wherein the weight ratio of the component A to the component B is 1:0.5; the resin paint component A is composed of alkyd resin, acrylic acid resin, aldehyde-ketone resin, titanium dioxide, a dispersant, a yellowing resistant agent, a chelating leveling agent, an antifoaming agent, an anti-settling agent and a solvent; and the curing agent component B is composed of a TDI-HDI mixed trimer or a TDI / TMP adduct, a HDI trimer, and a solvent. The finish paint has the advantages of high paint membrane gloss, beautiful and refreshing appearance like a white jade, crystal-liked, transparent, thick and high quality paint membrane, and smooth and mirror-liked decoration effect; can create a refreshing, grace, concise and tranquil space, brings people a relaxed and happy feeling, is accord with the modern aesthetics, is welcomed by the market and customers, and is widely used to protect and decorate surfaces of woodenware, metal products, and plastic products.

Description

technical field [0001] The invention relates to a preparation method of a two-component polyurethane wood gloss white finish, in particular to an anti-scratch and anti-yellowing two-component polyurethane wood gloss white finish suitable for various types of wood. Background technique [0002] With the improvement of people's material and cultural living standards, consumers have higher and higher requirements for the coating effect of furniture, which has led to the rapid growth of domestic wood coatings. The coating effect on the surface of furniture will directly affect consumers' choice of furniture. White light furniture is a classic product of modern fashion furniture. The simple and lively modern fashion atmosphere is vividly interpreted, which not only enhances the sense of product value, but also reflects the owner's unique appreciation taste and healthy life pursuit. The "white light" furniture can always give people a beautiful and brand-new feeling, and it can p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12
Inventor 许钧强李泽刚康伦国欧永杰姚东生
Owner UNION FOSHAN CHEM
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